A new synthesis of 7H-pyrido(1,2,3-de)(1,4)benzoxazine derivatives including an antibacterial agent, ofloxacin.
作者:HIROSHI EGAWA、TERUYUKI MIYAMOTO、JUN-ICHI MATSUMOTO
DOI:10.1248/cpb.34.4098
日期:——
A new method for the synthesis of 7H-pyrido[1, 2, 3-de][1, 4]benzoxazine derivatives was developed. The method is characterized by the intramolecular cyclization of 1-(1-hydroxyprop-2-yl)-8-fluoro-4-quinolones which are prepared in three or four steps from ethyl 2, 3, 4, 5-tetrafluoro-benzoylacetate. As an application of this method, ofloxacin, an antibacterial agent, was synthesized.
一种合成 7H-吡啶并[1,2,3-de][1,4]苯并恶嗪衍生物的新方法被开发出来。该方法的特点是 1-(1-羟基丙-2-基)-8-氟-4-喹诺酮的分子内环化,而这些喹诺酮是由 2, 3, 4, 5-四氟苯甲酰基乙酸乙酯分三或四步制备的。应用这种方法合成了抗菌剂氧氟沙星。